Composition for coating iron, steel, and wood



ALBERT C. HOLZAIPFEL AND PAUL WALTHER, 0F NEVI YORK, N. Y.

COMPOSITION FOR COATING IRON, STEEL, AND WOOD.

No Drawing.

To all whom it may concern:

Be it known that we, ALBERT C. HOLZAP- run and PAUL VVALTHER, subjects of the King of Great Britain, residing at New York, in the county of New York and State of New York, have invented certain new and useful Improvements in Compositions for Coating Iron, Steel, and \Vood, of which the following is a specification.

Our invention relates to a composition of matter, such as a varnish or the like, adapted for coating new iron and steel, also wood, and which may be subsequently covered with a paint of a lighter color, although not necessarily restricted to this use.

An important object of our invention is to provide a composition of matter of the abovementioned character, which will firmly adhere to new or uncoated iron, steel or to wood, when applied thereto, and which is insoluble in paints of a lighter color, applied thereto.

Other objects and advantages of the invention will be apparent during the course of the iollowing description.

It is well known that bituminous solutions are adapted to more firmly adhere to new iron and steel, when applied thereto, than ordinary oil paints. Such bituminous solutions ordinarily contain asphaltum and coal tar pitch, dissolved in hydrocarbons. Owing to the dark or black color of such bituminous solutions, it is desirable, after the same has suitably dried upon the iron, steel or wood, to coat the same with a paint of a lighter color, thus rendering the material more attractive in appearance. A marked disadvantage encountered in connection with the use of bituminous solutions, as above indicated, is that after drying, they are dissolved by the lighter colored oil-paints ap plied thereto, whereby the lighter colored paints are discolored. Owing to this disadvantage, the ordinary bituminous solutions are undesirable for many purposes for which they would otherwise be used.

In accordance with our invention, we provide a composition of matter, possessing all the advantages of the ordinary bituminous solutions, but being free from their objections. Our improved composition of matter comprises the following ingredients, preferably combined in the proportion indicated:

16 parts by weight of stearin pitch,

16 parts by weight of gums, such as copal,

dammar, etc, 68 parts by weight of tar oil.

Specification of Letters Patent.

Patented May 4, 1920.

Application filed July 25, 1919. Serial No. 313,252.

The proportion of the gums to the stearin pitch may be reduced or increased, according to the qualities of either or both materials, the principal fcature of the invention being the use of stearin pitch to render the composition insoluble by the light colored oil paints, when applied thereto.

The composition produced, as above indicated, is in the form of a bituminous varnish or solution possessing all or nearly all, of the adhesive and protective properties of the usual bituminous or bitumastic solutions, but is not dissolved by ordinary oil paints which may be subsequently applied to the same so that the oil paints of light color can be readily applied without discoloration.

These varnishes may also be mixed with various colors as a paint in which case the paint possesses to a large degree, the protective properties of the varnish;

It is to be understood that the form of our invention herewith described is to be taken as a preferred example of the same, and that various changes may be resorted to in the proportion of the several ingredients and. that known chemical equivalents may be employed without departing from the spirit of the invention or the scope of the subjoined claims.

Having thus described our invention, we claim:

1. A composition for coating iron, steel or wood, comprising tar oil, stearin pitch and gum, the combined weight of the stearin pitch and gum being less than the weight of the tar oil.

2. A composition for coating iron, steel or wood, comprising approximately 16 parts by weight of stearin pitch, 16 parts by weight of gum and 68 parts by weight of tar oil.

3. A paint comprising tar oil, stearin pitch and gum, the combined weight of the stearin pitch and gum being less than the weight of the tar oil, and a suitable pigment.

In testimony whereof we afiix our signatures in presence of two witnesses.

ALBERT .C. HOLZAPFEL. PAUL WALTHER.

Witnesses:

H. E. TEHAN, H. A. MOCARR. 

